Each phase of a 3-phase transformer is rated 6.6 kV/230 V, 200 kVA with a series reactance of 8%
(a) Calculate the reactance in ohm referred to HV/LV sides.
(b) The transformer is connected Y/Y. What is its 3-phase rating (voltage and kVA) and the per unit reactance.
(c) Calculate the pf of load (rated) at which voltage regulation would be maximum. If this load is fed at rated voltage on LV side, what should be the HV side line voltage?